Signalling flashing indicator with header



FIG. 1 is a front perspective view of the signalling flashing indicator with header showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines depict unclaimed environmental subject matter. 

The ornamental design for a signalling flashing indicator with header, as shown and described. 